Sewing-machine.



F. J. T. 6: H10. BELL.

SEWING MACHINE. APPLICATION FILED JUNE 17, 1911.

1,065,655, Patented June 24, 1913.

2 SHEET8SHEET 1.

aft {07729 COLUMBIA PLANOGRAPH 11., WASHINGTON, D. c.

"F. J. T. dz H. U. BELL. SEWING MACHINE. APPLIOATIdN FILED mm: 17, 1911.

1,065,655. Patented June 24, 1913.

2 SHEETSSHBET 2.

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FREDERICK J. '1. BELL, OF BURY, AND HARDY C. BELL, OF PADIHAM, ENGLAND.

SEWING-MACHINE.

Specification of Letters Patent.

Application filed June 17, 1911.

Patented June 24, 1913.

Serial No. 633,769.

To (ZZZ whom 2'25 may concern Be it known that we, Fnnpnmox JOHN TURNERBELL, a resident of Bury, and HARDY CECIL BELL, a resident of Padiham,both in the county of Lancaster, England, have invented new and usefulImprovements in Sewing-Machines, of which the following is aspecification.

This invention relates to that class of sewing machine which is known asthe two-reel lock stitch, and in which the underthread is placed in theform of a cheese, bobbin spool, cop or the like in which it comes fromthe manufacturer within a rotary casing which is driven in such a mannerby means intermittently engaging with and disengaging from it that theloop of needle thread formed by it can pass completely around and overthe casing.

More particularly this invention relates to that type of machine inwhich the rotary casing or holder which contains the bobbin or the likeof underthread is rotated by means of pins mounted in a face plate orequivalent rotating on an axis which is inclined to the axis of rotationof the casing or bobbin holder so that the pins alternately engage withand disengage from corresponding driving holes in the holder or casingso as to permit, in their disengaged positions, the formation of a loopof needle thread around such holder or casing and the disengagementtherefrom of the loop so formed.

This invention relates to a casing or holder of the constructiondisposition and arrangement hereinafter described and any requisiteaccessories so as to permit the bobbin or the like (hereinafter called abobbin) of underthread to be put into place within or be withdrawn fromthe casing or holder vertically or about vertically through the bedplate of the sewing machine. Devices may also be provided for preventingthe loop of thread from such a bobbin fouling the driving pins.

The accompanying drawings illustrate how our improvements may be carriedinto effect.

Figures 1 and 2 are elevations at right angles to each other of the raceor the like which contains the rotating bobbin casing. Fig. 3 is a planview of such part. Fig. 4: is a view illustrating the parts by which abobbin carrier is removed from the bobbin casing. Figs. 5, 6, 7 aredifferent views of the rotary bobbin casing, Fig. 6 showing it withoutits bobbin carrier. Fig. 8 is a plan view of a guard plate whichprevents the loop of needle thread, while passing around the rotarybobbin casing, from dropping into and being entangled with the drivinggear. Fig. 9 is a sectional view of the rotary bobbin casing with thestationary bobbin carrier and the bobbin in place. Fig. 10 is a view ofthe bobbin casing with the bobbin carrier and bobbin half lifted out.

Referring to the drawings A. is the bed plate of the machine.

B is the needle bar.

C is a rotary face plate provided with pins 0 projecting from its upperface disposed to alternately enter and leave holes in the bottom of therotary needle casing in such a manner that one of such pins at least isin engagement with the casing to drive it while the other or others isor are out of engagement therewith to permit the proper passage of theneedle thread loop around the casing and over the underthread. Such anarrangement is well known and needs no further description here.

In the drawings we have shown the face plate provided with three drivingpins, the bottom of the rotary casing being correspondingly perforated,but it is to be understood that this arrangement of three pins fordriving is not herein claimed.

D is a box or casing attached to the underside of the bed plate with itsaxis slightly angularly inclined to the vertical axis of the drivingplate C. This box serves as a race in which the rotary bobbin casingrotates and is formed with a gap at one side for the needle to enterandprimarily form the needle thread loop in the usual manner. E is thebobbin casing concentrically placed within the box D to rotate thereinand driven by engagement with the driving pins (2 of the face plate 0 inthe manner already indicated. By this arrangement of race and bobbincasing the bobbin which is placed in the casing as later described canbe withdrawn about vertically from its casing when desired through anopening in the bed plate. which opening is normally covered or closed bya sliding plate A G is an arm mounted on the center 7 and capable ofbeing operated through a connecting link H from an eccentric J mount--ed on the shaft K from which the driving face plate G is driven, so thatthe arm G is capable of movement downward and up again so as to occupythe two extreme posi tions indicated in Fig. l for each rotation of thedriving face plate and the bobbin casing. The end of this arm enters theloop of needle thread as soon as it is formed and pulls it downward ashereinafter described. The bobbin casing is provided with upper andlower flanges c o in each of which is formed a hook L l the hook L onthe lower llanpe being" somewhat in rear of the hook L on the upperflange in the direction of rotation. There is a gap in each flange infront of its hook.

The ope 'ation of the apparatus illustrated is as follows:The loop ofneedle thread a: is first formed in the gap of the race or box I) in theusual manner, the gap preceding the upper hook L of the rotating casinghaw ing at this time also arrived at the gap in the race to permit this.The end of the downward oscillating arm G then enters the loop thusformed and draws it downward. The needle having risen the hook L of theupper flange of the casing engages with the needle thread loop andbegins to carry it around with it, in its rotation. Fi 5 shows the upperhook just about to enter he needle loop which is being drawn downward bythe arm G. As the rotation of the casing continues the arm continues todescend. Fig. 6 shows the arm about half way down its stroke and showshow the first upper hook L has carried the needle thread loop with itpartly around its path of rotation. As the rotation of the casing andthe downward movement of the arm both continue the arm passes downwardthrough the gap formed in the lower flange before the hook in suchflange and such lower hook in turn engages with the needle thread loopin the manner similar to that in which it has been engaged by the upper.When this engagement of the lower hook is effected the arm begins torise (passing upward through the small gap (2 formed in the lowerflange) and is completely disengaged from the needle thread loop whichis now being carried around by the casino over its upper surface andunder its lower surface. vFlee Fig. '7. When the rotation is almostcompleted the needle thread is slid and pulled completely over thecasing by the pull of the take up motion of the machine (not shown) andis passed over the underthread 2 which is issuing; from the bobbincarrier within the rotary casing. he described operations are thenrepeated.

M is a guard plate which is a fixture at the bottom of the box or racel) and on which the rotary bobbin casine rotates and rests. In the formshown this plate is rectang'nlarly dished but it may be flat. This plateis protitled with a slot mconcentric to its center as shown in 8, suchslot being of such dimensions and being so formed that although itpermits the passage through it of the driving pin 0 to engage with thebottom of the rotary casing E it solid or unbroken where the pins aredisengaged from such casing. Thus although it affords an opening for theengaging pins it is solid over the disengaged pins and prevents thepassage of the needle loop thread downward on to the tops of thedisengaged pins.

The bobbin ll of uiu'lcrthread is forced over spines 0 placed on theoutside of a. tube t) which rotates upon a second tube 0 which isrigidly secured to the body ll of the bobbin carrier. Such tube in turnis placed over the axial pin ll which is ri dly secured to the rotarycasing. See F1 9. Such pin is thus capable of smoothly andconcentrically rotating within the bobbin carrying tubes and the bobbinitself freely rotates. The body of the bobbin carrier P is slotted topermit the threading of the underthread y, of the l)Ol')l)l1l N throughit as indicated. and the thread is then led away by being placed in aslit along a rib Q on the top of the bobbin carrier as shown in Figs. 7and 9. To prevent the bobbin carrier rotating when in use projections orlugs a a on the under side of the cover plate 11 come one on each sideof such rib Q when the bobbin carrie and the cover plate are both inplace. See Fig. l. The position of those lugs is also indicated by thedotted lines a a in Fig. 3. These lugs and the ribs only fit looselytogether so that the loop of needle thread can be easily pulled betweenthem. They are of course smooth and rounded. The lugs a a open outwidely at the leading ends so that they will always engage with the ribQ on the top of the bobbin carrier.

The bobbin carrier P and its bobbin may be lifted axially and verticallyout of its casing by means of the rib Q; but to enable it to be moreeasily disengaged than by such lifting it may be lifted by the rod Swhich passe. axially upward through the shaft of the face plate (l andup into the pin R which is made hollow for the purpose. F 4t. This pinis slotted and a cross pin attached to a loose disk T passes throughsuch slot and rests upon the upper end of the rod S. The bobbin carrierrests on this disk T. The rod S can be moved upward to raise the disk Tto the higher position indicated in Fig. 4 and consequently also liftthe bobbin by pressure on the finger piece S- which pressure and theconsequent movement is transmitted to the rod S through the rod V andthe two armed lever W. 011 the pres sure being relieved from the fingerpiece this finger piece rises, the rod V falls by gravity or by springpressure and the bobbin carrier may be put properly into place withinthe casing E through the upper opening of the latter. The rod is a loosefit in the axial bores of the face plate shaft and the pin R and it maybe bent or flexibly jointed.

What we claim is 1. The improvements in sewing machines comprising arotary bobbin casing having upper and lower hooks, a reciprocating armfor moving the needle thread loop from the upper hook to the lower one,and driving means for the rotary casing which driving means areintermittently in and out of engagement with the rotary casing in such amanner that the loop of needle thread passes completely over and aroundsaid casing, substantially asset forth.

2. The improvement in sewing machines, comprising a rotary bobbin casinghaving upper and lower hooks, a reciprocating arm for moving the needlethread loop from the upper hook to the lower one, and driving meanscomprising pins which alternately engage with and disengage from thebobbin casing in such a manner that the loop of needle thread passescompletely over and around said casing, substantially as set forth.

3. The improvement in sewing machines, comprising a rotary bobbin casinghaving upper and lower hooks, a reciprocating arm for moving the needlethread loop from the upper hook to the lower one, driving meanscomprising pins which alternately engage with and disengage from thebobbin casing in such a manner that the loop of'needle thread passescompletely over and around said casing, and a guard plate to prevent theneedle thread loop fouling the driving means, substantially ashereinbefore described.

4. The improvement in sewing machines, comprising a rotary casing havingupper and lower hooks, a reciprocating arm for moving the needle threadloop from the upper hook to the lower one, driving means for the rotarycasing which driving means are intermittently in and out of engagementwith the rotary casing in such a manner that the loop of needle threadpasses completely over and around said casing, a bobbin carriercontained in said rotary casing, and means for lifting the bobbincarrier in said casing, substantially as hereinbefore described.

In witness whereof we have hereunto set our hands in the presence of twosubscribing witnesses.

FREDERICK J. T. BELL. HARDY O. BELL. Witnesses:

JOHN OCONNELL, LLEWELLYN THOMAS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

